অধ্যায় ৩ঃ ডাটা টাইপ, ভেরিয়েবল, অ্যারে, অপারেটর ও কন্ট্রোল স্টেটমেন্ট

public class AddTwoNumbers
{

public static void main(String[] args)
 {

int num1 = 5, num2 = 15, sum;
sum = num1 + num2; +

System.out.println("Sum of these numbers: "+sum);

}

Output:
sum of these numbers: 20

import java.util.Scanner;
class AreaOfCircle
{
        public static void main(String args[])
      {

        Scanner in= new Scanner (System.in);

            System.out.print("Enter the radius: ");
            double r= in.nextDouble();
            double area=(22*r*r)/7;
            System.out.println("Area of Circle is: " + area);
      }

}

import java.util.Scanner;

    class CheckEvenOdd

{
  public static void main(String args[])
  {
    int num;
     System.out.println("Enter an Integer number:");

    //The input provided by user is stored in num Scanner input = new Scanner(System.in);

    num = input.nextInt();
    /*If number is divisible by 2 then it's an even number
    *else odd number"/

    if (num % 2 == 0)
    System.out.println("Entered number is even");
    else

    System.out.println("Entered number is odd");
  }
}

public class Example For

{

    public static void main(String[] args)

    {
        int i= 10;
        System.Out.print ("The reverse series is.");
        while (i > = 1)

        System.out.print(i);
        if(i==1)
        break;

        System.out.print(", ");
        I - -;
   }

}